one. Switch Description Use1， the battery is positive inward (lamp side)， the negative outward (tail).2， the switch in the rear， switch function Cheng An switch is a switch function， tap the switch is dimming function.two. Circuit boards for use1 OUR torch using advanced voltage constant current technology， can effectively solve the LED flashlight for constant current regulator requirements.2. Special Note:a. Do not use excess pressure， voltage should not exceed 4.2Vb. Battery positive root forward， not inverted， otherwise it will burn boardc. Note that control flashlight temperature changes， to ensure heat dissipationd. Non-professionals do not open the circuit board3， Warranty: Open or treated boards are no longer under warranty.three. Li-ion battery for use1， lithium batteries Features: Lithium battery charging and the phone is completely different; lithium batteries have no memory， rechargeable at any time， do not overcharge and over discharge.2， the first charge 6 hours at least， after the green light on the charger according to it， will not overcharge.3， in particular prompted to use anti-overcharge， anti-reverse， anti-short circuit， "three" charger;4， do not use the battery for a long time， should be stored fully charged， the normal three months or so and then charge and discharge time;four. Flashlight instructions1， the flashlight when in use， according to a flashlight battery voltage and asked to choose， do not mess with， to prevent burn circuit boards， different models， different voltage batteries Do not use. 2， in use， when the brightness change significantly when the flashlight to turn off the flashlight， causing the battery to prevent over discharge.3， cooling techniques: the torch during use， to ensure heat dissipation. Strongly urge the battery is fully charged， it is best to use second gear， this can make the flashlight and batteries was extended lamp life of the product! You can not direct people's eyes light flashlight， bright glare， so as not to affect vision， especially children.Fives. Troubleshooting1. Check the battery: Make sure the battery has power and the battery installed in the correct direction， do not use different brands of batteries， new batteries should not be mixed.2， check the tail cover: Ensure that the switch has been tightened and a good contact to ensure that the end cap pillars with metal end caps good contact pressure ring， watch cap is loose.